package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealDishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import javax.sql.DataSource;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * 菜品管理
 *
 * @FileName DishController
 * @Description
 * @Author Sword
 * @date 2024-03-01
 **/

@RequestMapping("/dish")
@RestController
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private SetmealDishService setmealDishService;

    @Autowired
    private DataSource dataSource;

//    @Autowired
//    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    @CacheEvict(value = "dishCache", allEntries = true)
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理某个分类下面的菜品缓存数据
//        String key = "dish_" + dishDto.getCategoryId() + "_1";
//        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    @CacheEvict(value = "dishCache", allEntries = true)
    public R<String> delete(@RequestParam List<Long> ids) {
        log.info("删除菜品,id:{}", ids);
        //清理某个分类下面的菜品缓存数据
        /*List<String> keys = ids.stream().map(id -> {
            Dish dish = dishService.getById(id);
            Long categoryId = dish.getCategoryId();
            String key = "dish_" + categoryId + "_1";
            return key;
        }).collect(Collectors.toList());
        redisTemplate.delete(keys);*/
        dishService.deleteWithFlavor(ids);

        return R.success("菜品删除成功");
    }

    /**
     * 批量启售停售菜品
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable Integer status, @RequestParam List<Long> ids) {
        log.info("菜品状态：{}，菜品id：{}", status, ids);
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null, Dish::getId, ids);
        //查询选中的菜品列表
        List<Dish> list = dishService.list(queryWrapper);
        //遍历集合
        for (Dish dish : list) {
            if (dish != null) {
                //将选中的菜品的售卖状态重新赋值
                dish.setStatus(status);
                dishService.updateById(dish);
            }
        }
        return R.success("菜品状态修改成功");
    }


    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")

    public R<Page> page(Integer page, Integer pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);

        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map(item -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId(); //分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();

                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    @CacheEvict(value = "dishCache", allEntries = true)
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
//        String key = "dish_" + dishDto.getCategoryId() + "_1";
//        redisTemplate.delete(key);

        return R.success("修改成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     * @GetMapping("/list") public R<List<Dish>> list(Dish dish) {
     * log.info("菜品信息:{}", dish);
     * //根据查询条件
     * LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
     * queryWrapper.eq(dish != null, Dish::getCategoryId, dish.getCategoryId());
     * //添加条件，查询状态为1(启售状态)的菜品
     * queryWrapper.eq(Dish::getStatus, 1);
     * //添加排序条件
     * queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
     * <p>
     * List<Dish> list = dishService.list(queryWrapper);
     * return R.success(list);
     * }
     */

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    @Cacheable(value = "dishCache", key = "#dish.categoryId + '_' + #dish.status")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;

        //动态构造key
//        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //先从redis中获取缓存数据
//        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        //如果存在，直接返回，无需查询数据库
        if (dishDtoList != null) {
            return R.success(dishDtoList);
        }

        log.info("菜品信息:{}", dish);
        //根据查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1(启售状态)的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map(item -> {
            //创建DishDto对象
            DishDto dishDto = new DishDto();
            //将dish拷贝到dishDto
            BeanUtils.copyProperties(item, dishDto);

            //获取dishId
            Long dishId = item.getId();
            //根据dishId查询口味信息
            LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
            dishFlavorLambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(dishFlavorLambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
//        redisTemplate.opsForValue().set(key, dishDtoList);

        return R.success(dishDtoList);
    }

}
